Harris’ partner Christopher Hodgkinson said she was addicted to Coke and the dead woman’s mother-in-law Vivien Hodgkinson had called for soft drinks to carry health warnings, Radio New Zealand reported.

“The first thing she would do in the morning was to have a drink of Coke beside her bed and the last thing she would do at night was to have a drink of Coke… she was addicted to Coke,” Christopher Hodgkinson said.

Vivien Hodgkinson said her daughter in law would “go crazy if she ran out… she would get shakes, withdrawal symptoms, be angry, on edge and snappy”.

“We never knew it was any harm because it was soft drink with no warning labels, I’ve never seen her drink anything else the fridge was always full of Coke,” she said. “Maybe it needs warning signs.”

Coca-Cola Oceania told Fairfax that excessive consumption of any liquid, including water, could have health impacts.

“We concur with the information shared by the coroner’s office that the grossly excessive ingestion of any food product, including water, over a short period of time with the inadequate consumption of essential nutrients, and the failure to seek appropriate medical intervention when needed, can be dramatically symptomatic,” it said.